Losing my mind

I have a 7 week old. For 2 weeks she was giving us 5-6 hour stretch’s of sleep a night and my wife and I were loving it. It felt so nice to be in somewhat of a routine. The last 5-6 days has been falling asleep on us only and the second we put her to bed she’s up immediately. My wife went back to work last week so I’m trying to do the brunt of it so she can try to get as much sleep as possible and I feel awful sometimes having to have her get the baby to sleep when she could be sleeping. Not necessarily looking for guidance but more so just venting. Please send good vibes 😂